SocialStudies revisionfor Final

........................is about understanding how everything in the environment works together.

Living things in a food web can either be .....................or ....................

Most of Myanmar's tropical...................are in Southern Myanmar.

When a forest is destroyed, the carbon gas into the air and adds to .................. ................

Forests are a ..................for more than half of the world's species.

The main reasons for ...............are commercial logging and development projects.

The air that we breathe, the atmosphere contains natural gases called ..................... ......................

Scientists know that ............ ................has an effect on climate, but they don't know exactly how much.

The rapid growth of the human population, together with improved .................... is one reason for the increase in the burning of fossil fuels.

Loss of ..................could have a major effect on the water systems of several countries, especially in Central Asia and South America.