Select a word or group of words you consider the most appropriate...

Select a word or group of words you consider the most appropriate for filling the blank space. The Earth's climate is _______ changing and evolving. Some of _______ changes have been due to natural causes but others can be attributed to X activities such as deforestation, emissions from industry and transport, etc., which have led to the _______ of gases and aerosols in _______ atmosphere. These gases are known as greenhouse gases because they trap heat and _______ air temperatures near the ground, acting like a greenhouse on the surface of the _______. In order to create and strengthen the scientific and analytical capacity _______ assessment of climate change in the country, different studies under Climate Change Action Programme _______. Many important bilateral and multilateral meetings and negotiations are held _______ regular intervals.