Why is the government drifting so far from its green pledges?

Lately are enviorment has started to show symptoms of the problems are planet is having with pollution we are putting in to it.  This is just a small taste of what is to come. Although the present government is considered the greenest government ever, are government is still having trouble fulfilling its green pledges because it is said to drag down business.  Many business leaders say that keeping its green pledge can cause economic problems for future business.  In my opinion are goverment should give a big enough tax cut to these companies that cant afford it so they are able to afford to go green.  Another option would be a put a high tax on foregin goods so that way the companies arent able to buy cheaper material from other country that in turn causes much pollution.