Cooling causes water vapor to condense and fall out as rain, sleet, or snow. Farms, grasslands and forests are considered sources or sinks of carbon dioxide, depending on the practices on these lands.
Oxygen is carried to body tissue during breathing and carbon dioxide is released. The biggest changes in the land carbon cycle are likely to come because of climate change. An increase in carbon dioxide could increase growth by fertilizing those few species of phytoplankton and ocean plants like sea grasses that take carbon dioxide directly from the water.
This increased growth is referred to as carbon fertilization. Tropical forests may also be extremely susceptible to drying.
Carbon dioxide, methane, and halocarbons are greenhouse gases that absorb a wide range of energy—including infrared energy heat emitted by the Earth—and then re-emit it. These gases help keep the Earth warm by absorbing the sun's energy and by redirecting energy back to the Earth's surface.
In the meantime, though, more acidic water will dissolve the carbonate shells of marine organisms, making them pitted and weak.
Because scientists know which wavelengths of energy each greenhouse gas absorbs, and the concentration of the gases in the atmosphere, they can calculate how much each gas contributes to warming the planet.
With too many greenhouse gases, Earth would be like Venus, where the greenhouse atmosphere keeps temperatures around degrees Celsius Fahrenheit.
At the same time that greenhouse gases have been increasing, average global temperatures have risen 0. If carbon dioxide is confined, it can decrease the amount of oxygen reaching the body.
So far, it appears that carbon dioxide fertilization increases plant growth until the plant reaches a limit in the amount of water or nitrogen available.