Well technically, every single human and all living things give off methane, including girls if you didn't know that, (no offense). So honestly, insects do give off methane.
yes
methane
They give off carbon dioxide.
In the US at least "natural gas" (the gas you have if you have a gas meter) is mainly methane with small amounts of ethane and heavier hydrocarbons. Propane (the gas you have if you have a big tank in your back yard) is, well, propane.
Hydrogen gas
no. the gas given off is carbon dioxide. a metal with acid gives off hydrogen.
No. Uranus contains methane in its atmosphere, but it does not give off methane.
Yes everything that dies and it's organic matter becomes methane. Anaerobically.
Methane and carbon dioxide.
The gas is methane (CH4).
Methane is given off by animals as a waste gas.
Waste in landfill sites give off methane gas as the waste breaks down. Methane is an ignitable gas, and vertical venting pipes may be seen across the site to burn off the gas harmlessly.
all plant eating animals do give off methane.
Animals give off a number of gasses during Day and night, most notably Carbon dioxide and methane gas. Oxygen is needed by man and animal.
Yes they do give off methane and this is even more harmful than carbon dioxide.
methane
yes it does
CO2 and methane.