Biomass = burning things. Sure it's a pretty good way to get rid of some trash & waste materials. But it stinks, people hate that, and it is limited by how much very heavy materials you have stored to be burned. In Europe they import wood pellets from the USA as back-up material to their trash. They cut down trees, ship them by diesel (Well, dirty bunker oil actually, which is, iirc, 3x more polluting) across the ocean and ship them to the Biomass sites by train & truck. Not green by any measure.
Biomass can be perfectly green. You depolymerize a bunch of agricultural waste, and you get oil. Then you use it in the plant.
It's not like burning oil is inherently bad. The Earth has a carbon cycle just like it has a water cycle. The problem is that we're digging up carbon that's been locked in the ground for millions of years, thus adding net carbon to the cycle. If you depolymerize and and burn agricultural waste, everything stays in the same cycle, and it's no more harmful to the environment than releasing steam into the air.
Biomass can be perfectly green. You depolymerize a bunch of agricultural waste, and you get oil. Then you use it in the plant.
It's not like burning oil is inherently bad. The Earth has a carbon cycle just like it has a water cycle. The problem is that we're digging up carbon that's been locked in the ground for millions of years, thus adding net carbon to the cycle. If you depolymerize and and burn agricultural waste, everything stays in the same cycle, and it's no more harmful to the environment than releasing steam into the air.