Well, CFL bulbs _are_ bad for the environment. Think of all the dangers that the mercury inside poses to the environs (not to mention trouble with their safe disposal). But they give more light for less power, that’s true. And hybrid cars (or any cars/buses) are OK as long as they don’t use biodiesel. We need that land to grow food not oil, dammit.

About CFL, CFLs have less mercury inside than they offset mercury from the coal power plants [1]. “…if all 290 million CFLs sold in 2007 were sent to a landfill (versus recycled, as a worst case) – they would add 0.13 metric tons, or 0.1 percent, to U.S. mercury emissions caused by humans….” Second, at least in US, coal power plans are the main producers of electricity [2].

About biodiesel, most of land is not used to produce biodiesel, but food. And not food for humans. It is produced as a food for animals. I cannot find a reliable source for this, but I saw numbers between 60 and 70 % of all farm land to be used for animal feed. So, I would say really biodiesel is not as much of a problem as meat eating is. But just looking at average American, you know that there is way too much food in the world.

1. http://www.energystar.gov/ia/partners/promotions/change_light/downloads/Fact_Sheet_Mercury.pdf
2. http://en.wikipedia.org/wiki/Image:Sources_of_electricity_in_the_USA_2006.png