подчеркните в каждом из предложенийглагол-сказуемое и определите его видо-временную форму и

Подчеркните в каждом из предложений
глагол-сказуемое и обусловьте его видо-временную форму и залог.
Переведите предложения на российский язык.
1. The US Environmental Protection Agency (EPA) was established in December
1970, bringing together in a single agency the many federal programs to protect
environment.
2. The biosphere is strongly affected by all sorts of human activity.
3. The problem has already been discussed at a large number of conferences.
4. Scientists are studying various aspects of human biology and the origin and
development of human race.