As Big Oil struggles to repair its image in the wake of the disastrous Gulf of Mexico oil spill, Chevron Corp. is responding head-on to industry critics. The company's new ads, designed to evoke anti-industry posters, feature slogans such as "Oil companies should put their profits to good use" and "It's time oil companies get behind renewable energy." Stamped in red are the words, "We agree." The ad campaign, which will debut Monday, is a departure for [the] industry...Rhonda Zygocki, vice president for policy, government and public affairs at Chevron...[said] "The directness of this campaign we're hoping will at least draw attention"..., adding that the timing of the campaign wasn't influenced by the oil spill. But the campaign comes as the industry is trying to recover from the April 20 blowout of a well owned by BP...The disaster only worsened the image of an industry that the public has consistently ranked dead last among 25 business sectors in Gallup polls...Company critics...accuse Chevron of funding opposition to California's 2006 climate-change law; Chevron says it is "working constructively" with the state on the law and isn't supporting efforts to repeal it.