brian mulroney: We had all the information we needed to take action, according to National Observer. The science was clear. Back in the 1980s, when I first started work to protect a stable climate, I was sure that before the year 2000 we would succeed. Business-oriented but environmentally conscious leaders like Brian Mulroney and Margaret Thatcher had seen and heard enough. Don't miss out on the latest news Sign up for our daily briefing By 1992, all the world's governments agreed that only global action could save us from melting permafrost, rising seas, extreme weather events, retreating glaciers. In the late 1980s, they started pushing for action. (www.immigrantscanada.com). As reported in the news.