What do scientists believe?
THEY BELIEVE that IT IS HUMAN ACTIVITY that is driving the temperatures up.
How can consumers help cut greenhouse gas emissions?
They can help by SAVING ENERGY around the house, SWITCHING to compact fluorescent light bulbs, and DRIVING fewer miles in a car each week.
What happens to the energy the sun radiates to the Earth?
THE EARTH and THE ATMOSPHERE absorb some of this energy while the rest is radiated back into the space.
What has happened to the Earth's climate for 2.5 million years?
IT HAS fluctuated, cycling from ice ages to warmer periods.
What do scientists believe has happened to the greenhouse effect?
They believe the greenhouse effect HAS BEEN INTENSIFIED by the extra greenhouse gases that HUMANS HAVE BEEN REALISING