1971 constitutional convention Alvarez was a young activist who participated in the 1971 constitutional convention. He refused to sign the
Ferdinand Marcos regime backed constitution that gave extensions to the president's term in office.
Escape from the dictatorship On the day when Ferdinand Marcos suddenly imposed martial, Alvarez had been at the
University of the Philippines Diliman attending a public forum with Senator Benigno “Ninoy” Aquino Jr. When his girlfriend
Cecile Guidote told him that she had work to finish and could not join him for their planned dinner, he decided to stay overnight at his ConCon office to work on a speech. As a result, he was able to evade Marcos' soldiers who had succeeded in arresting most of the oppositionist ConCon delegates, including Aquino. He went into hiding in various places for a while, but the oppositionists soon suggested that he go to the US to help gather support for their resistance against Marcos, working with Senator
Raul Manglapus who had likewise escaped capture because he was overseas on a speaking engagement when martial law was declared.
Exile during martial law While in exile, he was one of the organizers of the Movement for a Free Philippines, which did what it could to bring the dictatorship to an end. When Ninoy Aquino was assassinated in 1983, Alvarez organized the Ninoy Aquino Movement, which lobbied for the US Government to stop supporting Marcos, despite the latter's closeness to Ronald Reagan. Their father, Capt. Marcelo Alvarez, who had begged Sonny to be more discreet in his opposition to Marcos, died of a heart attack after he learned of Marsman's death. Senator Alvarez also held two cabinet positions - Secretary of Agrarian Reform (February 7, 1987 – March 7, 1987) and Secretary of Environment and Natural Resources (March 29, 2001 – December 13, 2002). He was known as staunch environmentalist as he was called "Mr. Environment" during his term as Environmental Secretary. From 2009 to 2016, he served as commissioner and vice chair of the Climate Change Commission. ==Personal life==