ok, first, the enviroment is not going to decline because of glow fuel, im sorry but i call bs on global warming. second, i am talking a bit of larger aircraft but i am also talking about park flyers, there are small engines. and i have found that a glow engine in easier to maintain than a motor, flies longer and smoother, and doesnt have that constant but slow decline in power till the speed control cuts off. it might possibly be a little heavier, but it makes up for it in pure purring power. last, for now until i get to or out of college, i am limited in the places i can go, so i dotn have access to an area where i can fly a plane with the power of a glow or gas engine, so please, i DO see that apperently these brushless are better than a brushed, SO WILL SOMEBODY GIVE ME A LINK TO THESE 20-30 DOLLAR BRUSHLESS SYSTEMS. by the way, when i say system, to me that includes batteries, lipo or nimh, and a charger if they are lipos. im serious, i only have a few bucks right now