By 2016, national fuel economy standards will require cars that meet : 39 Mpg.
The higher the rate is, the more environment friendly the cat would be, since it could cover a longer distance with lesser fuel.
Hope this helps
what could cause an ignous rock to become soil? D) All of the above, is the correct answer.
In the earths mantle the convection currents pass through the mantle which then causes friction in the tectonic plates causing earthquakes,volcanoes or tsunamis
When on Southern Hemisphere there is summer.
