Greenhouse gases can be removed from the atmosphere by various processes, as a consequence of: 1  a physical change (condensation and precipitation remove water vapor from the atmosphere). 2  a chemical reaction within the atmosphere. 3  a physical exchange between the atmosphere and the other compartments of the planet.
What we can say is that the vast majority of people infected with HIV will develop AIDS sometime during their life (an average of 10 years or more after infection), and with early intervention and treatment, they could potentially live with AIDS for many years more.
HIV-infected people can remain healthy for a long time, show no symptoms and carry on with their work in a normal way. Some people remain HIV positive for many years without any manifestation of clinical disease while others may deteriorate rapidly, develop AIDS and die within months.