Today I am going to give a talk about the environmental situation in Moscow.

Moscow is a large city with a lot of factories,plus Moscow's roads are always filled with cars which causes a lot of trafic.

Cars and factories release harmful gases, which in turn pollute the whole air around.

Factories also release a lot chemicals in rivers or lakes.Due to that the Moscow river is really polluted right now.

Fortunately, a lot of trees have been planted in Moscow lately.