is caused when nitrogen and carbon compounds in the air react in sunlight. PLEASE HELP ASAIP ITS IMPORTANT!!!
A.)CFC's
B.)Particulate matter
C.)Carbon monoxide
D.)Photochemical smog
E.)Acid precipitation

Which of these statements best describes the st. lawrence seaway? the st. lawrence seaway connects the st. lawrence river with the arctic ocean. the st. lawrence seaway provides an important trading route between the u.s. and mexico. the st. lawrence seaway provides an important trading route for the u.s, but has little value for canada. the st. lawrence seaway connects the great lakes, the st. lawrence river, and the atlantic ocean.

This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment

What do your cells need to live? a. carbon dioxide b. carbon c. air d. oxygen