In the united states, where can early geological periods be studied?

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

You want to cultivate some exotic plants at your farm. however, the climate is chillier than the temperature range favorable to the crop. which is the best method to use for the cultivation of this exotic crop? a. use a crop rotation method b. use a lot of fertilizer c. prepare the seed bed properly d. use a greenhouse e. use irrigation

When fossil fuels are burned, carbon dioxide is released. how does this gas impact the environment?