dd...I'm not saying that fish don't feel pain, just that some argue that its not of the same magnitude as animals with more elaborated neural systems. Personally I don't know enough about this to decide one way or the other...just providing it as an example.
Since some people here seem curious about information, the last numbers I saw had 1 acre of rain forest, per year, per person, being destroyed for new grazing land. Personally that raises a score of associated considerations in my mind including, but not limited to, (1) oxygen production and air filtering requiring large, uninterrupted tracts of forest, (2) extinction of various plant and animal species (keep in mind that over half of the earth's surface biodiversity – there is more in the oceans – is in the rain forests), and (3) possible non-synthesizeble medicinal compounds being wiped out.