Climate change may be having its day in court. With the slow pace of international climate negotiations, lawyers from Switzerland to San Francisco are increasingly filing lawsuits demanding action. And they are getting creative — using new legal arguments to challenge companies and governments before a judge. Two decades ago, only a handful of climate-related lawsuits had ever been filed worldwide. Today, that number is 1,600, including 1,200 lawsuits in the United States alone, according to data reported Friday by the London School of Economics.“The courts are an increasingly important place for addressing the problem of climate change,” said Hari Osofsky, the dean of Penn State Law and the School of International Affairs. Already, climate campaigners are seeing glimmers of success.In the Netherlands in December, the country’s Supreme Court upheld a ruling in favour of the Urgenda campaign group’s demand that the Dutch government move faster to cut carbon emissions. And in January, a judge in Switzerland acquitted a dozen climate protesters from trespassing charges, filed after the group staged a tennis match within a branch of Credit Suisse in 2018 to draw attention to the bank’s fossil fuel loans. Defence lawyers had argued that the protesters’ actions were necessitated by the “imminent danger” posed by climate change. The ruling was met in court with a standing ovation.“It was an exceptional ruling,” one of the defence lawyers, Aline Bonard, told Reuters. Given that the protesters admitted to trespassing, “the infraction is undeniable.”But cases like these suggest a shift in how people are understanding the role of the judiciary in mediating cases related to the warming climate. Now, “there is bound to be a new wave of legal proceedings using a similar line of argument,” Bonard said.NEW LEGAL TACTICSAs rulings that compel governments to cut emissions remain rare, lawyers still see promise in targeting large, polluting companies. Such cases in the past tended to accuse coal-fired power stations or government of failing to limit emissions. Cases now are being fought on arguments such as consumer protections and human rights.This shift been especially pronounced in the United States, where more than a dozen cases filed by states, cities and other parties are challenging the fossil fuel industry for its role in causing climate change and not informing the public of its harms. (Reuters Insight: https://reut.rs/31QUB6b)Last month, both Minnesota state and the District of Columbia filed lawsuits alleging that oil majors had misled consumers on how using their products involved releasing carbon emissions and contributing to climate change.Those cases followed another filed in October by Massachusetts, which also used consumer protection arguments in suing Exxon Mobil Corp. All three accused the oil companies of engaging in deceptive practices and false advertising.“As awareness of climate change grew in the general public to the extent that their disinformation campaigns were no longer acceptable, there was a pivot to greenwashing,” Kate Konopka, Washington D.C.’s deputy attorney general, told Reuters.In each case, most of the companies denied the allegations. BP Plc declined to comment.Exxon said the Washington D.C. lawsuit was part of a “coordinated, politically motivated” campaign against energy companies and was without merit. Chevron Corp also dismissed the D.C. case, saying the litigation “distracts” from its efforts to address climate change.Royal Dutch Shell Plc said it was “committed to playing our part” in addressing climate change, but that lawsuits “impede the collaboration needed for meaningful change.”But companies appear to be worried. The National Association of Manufacturers formed a group in 2017 to push back against “activist lawyers” for trying to scapegoat energy manufacturers.The group, called the Manufacturers’ Accountability Project, applauded a December ruling in New York clearing Exxon Mobil of securities fraud charges, after it was accused of failing to inform investors about what it knew about climate change.