12 photos that show how humans have changed the world's forests

According to the World Wildlife Fund, 7.5 million hectares of forest disappear each year.

Deforestation, pollution, climate change, and old-fashioned human inattention are damaging the world's forests.

Here are 12 photos that show how much our forests have changed.

12 PHOTOS

1. Parts of the Amazon rainforest contain pools of dirty water left over from a hydraulic mine.

2. Illegal gold mining in Peru has damaged its forests.

3. In Brazil, illegal logging is causing rapid deforestation.

4. The Inter-Ocean Highway connecting Peru and Brazil through the Amazon rainforest was built for economic growth but has led to massive deforestation.

5. Farmers are illegally clearing patches of rainforest to grow more crops and more livestock.

5. Farmers are illegally clearing patches of rainforest to grow more crops and more livestock.

7. It's not just the Amazon rainforest that's experiencing deforestation. Sudan lost 8.4% of its forest cover between 1990 and 2010.

8. As more of India's forests disappear, wildlife is being pushed into populated areas.

9. According to the World Wildlife Fund, Borneo, Malaysia has lost half of its forest cover at a rate of 1.3 million hectares per year.

10. Indonesia's forest is a quarter the size of the Amazon, but it lost more hectares of forest in 2012.

11. Deforestation can have serious environmental impacts.

12. Human inattention is also a factor that damages forests, such as the garbage dump in the Pisang Batu River in Indonesia.