Question

The environmental legislation signed by President Bush in 1990

focused on chemicals polluting the water.
loosened restrictions on gasoline for cars.
set stricter standards on pollution from factories.
created tough requirements for drilling for oil and gas.

Answer 1

the correct answer is "set stricter standards on pollution from factories." 

Answer 2

The environmental legislation signed by President Bush in 1990 set stricter standards on pollution from factories. This was done to prevent the negative results of pollution, since everything concerning that was getting worse and worse.