oxygen
nitrogen
hydrogen
Yes. Most of the greenhouse gases do occur naturally, particularly carbon dioxide (CO2). By maintaining the temperature that we enjoy today, these gases are essential to life on earth as we know it, as long as the concentrations of the gases do not rise or fall appreciably. In the absence of human activity the concentrations of greenhouse gases remain more or less constant over time, so that there is no effect on global warming. However, when human activity results in even a small increment in the concentrations of greenhouse gases, we begin to get global warming and climate change.
These are some of the man-made greenhouse gases: * SF6 (Sulfur hexafluoride) * CFC-11 * CFC-12 * CFC=1113 * Carbon tetrachloride * HCFC-22
Chlorine gas does not occur naturally as it is too reactive. Chloride salts occur naturally. The most common is sodium chloride, NaCl. Chlorine, Cl2, is obtained by electrolysing molten NaCl.
Yes, it occurs naturally on earth.
Yes
Xenon occurs naturally in the atmosphere. It is found as a mixture of gases along with other noble gases.
I wouldn't say that many chemicals occur naturally in the air, however Oxygen and Nitrogen are the two main gases that make up the Earth's atmosphere.
No, noble gas compounds can only be produced artificially.
Yes. It accounts for around 11% of the barium of earth.
Yes. Most of the greenhouse gases do occur naturally, particularly carbon dioxide (CO2). By maintaining the temperature that we enjoy today, these gases are essential to life on earth as we know it, as long as the concentrations of the gases do not rise or fall appreciably. In the absence of human activity the concentrations of greenhouse gases remain more or less constant over time, so that there is no effect on global warming. However, when human activity results in even a small increment in the concentrations of greenhouse gases, we begin to get global warming and climate change.
It DOES occur naturally. It is an ore. It is not man made.
Gases naturally mix with each other when combined due to entropy.
Thallium, discovered in 1861, does occur naturally, but not in its pure form.
Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.Rivers are not built, they occur naturally, so there is no year that the river Lee was built.
During the stage of photosynthesis, the exchange of gases occur in the leaves.
We are releasing carbon dioxide the most, and methane second. Other greenhouse gases, like water vapor, occur naturally and we cannot control them.
94 kinds of atoms occur naturally on earth