Scientists acknowledge that climate can be affected by factors external to the land-ocean-atmosphere climate system, such as variations in solar brightness, the shading effect of aerosols injected into the atmosphere by volcanic activity, or 
(the shading effect of aerosols; injected; into the atmosphere) Context(the shading effect of aerosols injected,List([157, 196))):(Scientists; acknowledge; that climate can be affected by factors external to the land-ocean-atmosphere climate system, such as variations in solar brightness) Context(Scientists acknowledge the shading effect of aerosols injected,List([0, 196))):(climate; can be affected; by factors external to the land-ocean-atmosphere climate system, such as variations in solar brightness)
the shading effect of aerosols injected,List([157, 196)) Scientists acknowledge the shading effect of aerosols injected,List([0, 196))
the shading effect of aerosols Scientists climate
injected acknowledge can be affected
into the atmosphere
that climate can be affected by factors external to the land-ocean-atmosphere climate system, such as variations in solar brightness
by factors external to the land-ocean-atmosphere climate system, such as variations in solar brightness