An enhanced (or accelerated) greenhouse effect which is causing global warming.
If your question is really about oxygen then it is false. And oxygen is not increasing in the atmosphere. If you are talking about carbon dioxide, a gas that IS increasing in the atmosphere, then it is true. Carbon dioxide is causing the speeding up of global warming.
Carbon dioxide is increasing in the atmosphere, and oxygen is decreasing.
It is not incorrect, Greenhouse gases are Methane and Carbon Dioxide and their increasing presence in Earth's atmosphere is causing the temperature of the atmosphere to rize (warm).
It is not dangerous to breathe the amounts in the atmosphere, but the small percentage is causing an enhanced (or accelerated) greenhouse effect which is causing global warming. So it is certainly a hazard to humans.
Carbon Dioxide or CO sub 2
The burning of fossil fuels affects the concentration of carbon dioxide in the atmosphere by increasing it.
Global warming is the effect of increasing Carbo Dioxide (CO2) levels in the earth's atmosphere which trap the heat thus causing the earth to gradually warm up.
The present levels of carbon dioxide dioxide in the atmosphere are causing global warming and climate change.
The increase of carbon dioxide in the atmosphere is causing global warming and climate change.
Most of Titan's atmosphere is nitrogen. There is only trace amounts of carbon dioxide.
No. The atmosphere of Venus is mostly carbon dioxide with some nitrogen and trace amounts of other gasses.
Yes. Carbon dioxide is a greenhouse gas. If levels of it in the atmosphere are higher than normal, then they trap more heat. This is causing global warming, and the world warming is causing changes in climate.