Solar and wind can make very large impacts on electricity generation - see the Desertec website for lots more information: http://www.desertec.org/
Research has shown that geographically distributed renewable generation can be used as reliable base-load, although I can't find the reference at the moment.
The CO2 payback times for various technologies are shown here: http://www.envirowiki.info/CO2_payback , although this does miss out other payback times that are relevant.
Winds and pressure regions around the world are primarily caused by temperature contrasts between the poles and the equator, and between land and sea (due to water having a much larger thermal inertia than land). Huge numbers of wind turbines will not effect this in any way.
Modern wind turbines kill very few birds, orders of magnitude less than cars and window collisions (http://www.treehugger.com/files/2006/04/common_misconce.php). Older wind tubines have faster rotational speeds which kill more birds than modern turbines.
Bats, again, are not effected too much by modern wind turbines as the blades are are sufficiently high above the ground that bats will never come into contact with them, as bats rarely fly at high altitudes (see PDF linked from http://naturalengland.etraderstores.com/NaturalEnglandShop/T...).
Please, don't rant unless you know the facts.