A. Any form of nature travel is sometimes mistaken as ecotourism.

B. Ecotourism can be sometimes mistaken for any form of nature travel.

C. Ecotourism can be sometimes mistaken as any form of nature travel.

D. Ecotourism is, to some people, mistaken as any form of nature travel.

A. Unless those areas are not damaged or destroyed, they will be available to future generations.

B. Because those areas are damaged or destroyed, they will not be available to future generations.

C. To keep them available to future generations, those areas must not be damaged or destroyed.

D. If damaged or destroyed, those areas will not be available to future generations any longer.

A. Tourists provide us with the principles of ecotourism throughout their trip.

B. We aim at providing the principles of ecotourism for tourists throughout their trip.

C. We provide ourselves with the principles of ecotourism through our trip.

D. We need more information about the principles of ecotourism for our trip.

A. Tourists are free to learn about the vital eco-systems before arriving.

B. It is optional for tourists to learn about the vital eco-systems before arriving.

C. Tourists are not required to learn about the vital eco-systems before arriving.

D. Tourists are required to learn about the vital eco-systems before arriving.

A. Eco-travellers are not required to protect the environment.

B. Eco-travellers are encouraged not to have any negative impacts on the environment.

C. It is eco-travellers' responsibility to prevent or minimize any negative impacts on the environment.

D. Eco-travellers have never had any negative impacts on the environment.

A. If you were an optimist, you would be able to the all the advantages of global warming.

B. Global warming has a lot of advantages if you see it from a positive viewpoint.

C. Seeing global warming from a negative viewpoint, you would see its advantages.

D. If you wear a negative attitude towards global warming, you will see all of its advantages.

A. As ecotourism is properly carried out, it can support conservation and environmental management.

B. In order for ecotourism to support conservation and environment management, it is properly carried out.

C. Only when properly carried out can ecotourism support conservation and environmental management.

D. Supporting conservation and environmental management, ecotourism is properly carried out.

A. Using alternative sources of energy more will mean saving the planet.

B. The planet would be destroyed if we stopped using alternative sources of energy.

C. If no more alternative sources of energy are used, the planet will be destroyed.

D. Not using alternative sources of energy more will destroy the planet.

A. You are advised to choose your travel provider on the basis of their eco principles and practices before your departure.

B. You are obliged to choose your travel provider on the basis of their eco principles and practices before your departure.

C. You are required to choose your travel provider on the basis of their eco principles and practices before your departure.

D. You have to choose your travel provider on the basis of their eco principles and practices before your departure.

A. You don't have to educate yourself about the destination you are visiting by reading guidebooks and travel articles.

B. You aren't required to educate yourself about the destination you are visiting by reading guidebooks and travel articles.

C. You should educate yourself about the destination you are visiting by reading guidebooks and travel articles.

D. You may object to educating yourself about the destination you are visiting by reading guidebooks and travel articles.

A. Whenever you can travel by train instead of plane.

B. Traveling by train is much better than traveling by plane.

C. You can never avoid travelling, so take the train or the plane.

D. Instead of travelling by plane, you can travel by train.

A. The world absolutely needs more ecotourism which teaches travelers to be more responsible to the pristine areas of the world.

B. The world absolutely needs more ecotourism as it teaches travelers to be more responsible to the pristine areas of the world.

C. The world absolutely needs more ecotourism so that it teaches travelers to be more responsible to the pristine areas of the world.

D. The world absolutely needs more ecotourism if it teaches travelers to be more responsible to the pristine areas of the world.

A. Because tourism allows us to do more than just learn facts about various locations, it allows us to immerse ourselves into the cultures and lifestyles of others.

B. If tourism allows us to do more than just learn facts about various locations, it will allow us to immerse ourselves into the cultures and lifestyles of others.

C. Not only does tourism allow us to do more than just learn facts about various locations, it also allows us to immerse ourselves into the cultures and lifestyles of others.

D. When tourism allows us to do more than just learn facts about various locations, it allows us to immerse ourselves into the cultures and lifestyles of others.

A. Ecotourism educates visitors about environmental responsibility, which can help raise awareness about political and social issues.

B. Ecotourism not only educates visitors about environmental responsibility, but it also can help raise awareness about political and social issues.

C. Ecotourism educates visitors about environmental responsibility by helping raise awareness about political and social issues.

D. Ecotourism educates visitors about environmental responsibility, hence helping raise awareness about political and social issues.

A. Poaching is a big issue in Africa where endangered animals are often killed for a single body part that is sold illegally on the black market.

B. Poaching is a big issue in Africa as endangered animals are often killed for a single body part that is sold illegally on the black market.

C. Poaching is a big issue in Africa, so endangered animals are often killed for a single body part that is sold illegally on the black market.

D. Poaching is a big issue in Africa when endangered animals are often killed for a single body part that is sold illegally on the black market.

A. You can't remove any products from the nature, so it is illegal.

B. Because you can't remove any products from the nature, it is illegal.

C. You can't remove any products from the nature because it is illegal.

D. You can't remove any products from the nature unless it is illegal.

A. Living areas are damaged or destroyed because they might not be available to future generations.

B. Living areas are damaged or destroyed, but they might be available to future destroyed.

C. Living areas might not be available to future generations if they are damaged or destroyed.

D. Living areas might not be available to future generations unless they are damaged or destroyed.

A. You should try to limit the use of natural resources unless they are running out in many tourist destinations.

B. Because you try to limit the use of natural resources, they are running out in many tourist destinations.

C. You should try to limit the use of natural resources, so they are running out in many tourist destinations.

D. Natural resources are running out in many tourist destinations, so you should try to limit their use.

A. We don't allow the local people to hunt endangered species for our consumption, so they will become extinct sooner.

B. If we allowed the local people to hunt endangered species for our consumption, they would become extinct sooner.

C. We don't allow the local people to hunt endangered species for our consumption unless they will become extinct sooner.

D. They will become extinct sooner if we don't allow the local people to hunt endangered species for our consumption.

A. You will support local community if you stay in locally owned accommodation and buy products from local people.

B. You will support local community unless you stay in locally owned accommodation and buy products from local people.

C. You stay in locally owned accommodation and buy products from local people because you will support local community.

D. You stay in locally owned accommodation and buy products from local people only if you will support local community.