Ответ:

1. If we continue to pollute the oceans, marine life may face extinction.
2. If we don't reduce our carbon emissions, climate change will become irreversible.
3. If we cut down all the trees, we will destroy the habitats of many animal species.
4. If we don't recycle, landfills will overflow and damage the environment.
5. If we don't conserve water, we may face water shortages in the future.
6. If we continue to use plastic bags, we will harm the environment and wildlife.
7. If we don't protect coral reefs, they will die and impact the ocean ecosystem.
8. If we don't protect endangered species, they will go extinct and harm the balance of nature.
9. If we don't reduce air pollution, people will suffer from respiratory diseases.
10. If we don't protect wetlands, we will lose important water filtration and flood protection systems.
11. If we don't use renewable energy sources, we will continue to deplete non-renewable resources.
12. If we don't take action to protect the environment, future generations will inherit a damaged and polluted planet.