the DVR records everything, you can change cameras on the fly, it's all recorded.
Most have access via internet and there are several apps to be able to access it via mobile. This is a big plus if there is a reported problem, you can see it instantly. Quality of cameras is important, especially for night shots, having motion sensitive lighting is a must.
Something like this is nice because you have control of the camera angles
http://www.123securityproducts.com/c...FUdxQgodSgoABA
Don't use wireless
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Carbon is not the problem, it makes up 0.041% of our atmosphere , 95% of that is from Volcanos and decomposing plants and stuff. So people in the US are responsible for 13% of the carbon in the atmosphere which 95% is not from Humans, like cars and trucks and stuff and they want to spend trillions to fix it while Solar Panel plants are powered by coal plants
think about that