The bill's sponsor -- Rep. Eugene DePasquale, D-York -- is hoping for a House vote on dozens of amendments "soon."
The coal caucus, which includes 68 members, believes the bill is a threat to jobs in Western Pennsylvania. The bill calls for increasing the renewable energy used in Pennsylvania from 8 percent of the total to 15 percent by 2024.
Although amendments are designed to soften opposition from backers of the fossil fuel, Rep. Jeffrey Pyle, R-Ford City, the coal caucus' co-chair, said he doesn't expect to change his mind.