Some days are uneventful, with little but the promise of extra pie for dessert to get you through. And then … some days are pivots upon which the course of history turns, moments in time when each of us are called upon to decide the kind of future we want for ourselves and our children, and take to the ramparts. Tomorrow is one such day.

Tomorrow, the Senate will vote on a revised energy bill. Negotiators have jettisoned the renewable electricity standard (RES) and altered some of the revenue-raising tax provisions to make it more palatable to oil-aligned senators and the White House. Still in are CAFE and critical solar investment tax credits necessary to bring solar into the mainstream.

The vote will be extremely close — the bill needs 60 votes to pass, and the opposition is burning up the phone lines, urging Senators not to vote for a bill that eliminates unneeded production incentives for the oil and gas industry. Word is the good guys are one vote short.

Some people are taking advantage of this moment in history to call their senators and tell them how they feel about renewable energy. Those people find the number of their senators here.

Grist thanks its sponsors. Become one.

Bill text, bill summary, and solar talking points can all be found here.