However, CFCs have long lifetimes in the atmosphere before they are broken down by sunlight, and consequently they Cause will continue to enhance the greenhouse effect well into the 21st century. [ ENCY 0 MCLH 18/04/2014 ]

The Montreal Protocol in 1987 has helped to phase out CFCs emissions in an attempt to protect the ozone layer, but because of their long atmospheric lifetimes, they Cause will continue to influence the greenhouse effect for many years. [ ENCY 0 MCLH 18/04/2014 ]

As soon as warming melts the snow and the pack ice, the mean albedo diminishes considerably, the 'ground' absorbs more and more heat, carbon dioxide enters the atmosphere from the ocean Cause , thus increasing the greenhouse effect , and thus increasing the mean temperature and so on. [ JACLET 0 MCLH 18/04/2014 ]

The greenhouse effect as a result of human activities Cause , which is a perturbation rather than pollution, largely escapes that definition because of its global reach and the time lag of its effects. [ JACLET 0 MCLH 18/04/2014 ]

This is because the greenhouse gas is gradually removed from the atmosphere through natural removal mechanisms, and its Cause influence on the greenhouse effect declines. [ CHANG ENCY 0 MCLH 18/04/2014 ]

Despite uncertainties, the general scientific consensus is that increased levels of greenhouse gases as a result of mankind 's activities Cause are enhancing the Earth 's Location natural Source greenhouse effect and causing global warming. [ ENCY 0 MCLH 18/04/2014 ]

The Earth Location has a natural Source greenhouse effect which keeps it much warmer that it would be without an atmosphere. [ ENCY 0 MCLH 18/04/2014 ]