Home / MCQs / Rio Earth summit was held in? Rio Earth summit was held in? Published on January 17th, 2020 - Leave a comment Rio Earth summit was held in?(a) May 1991(b) June 1992(c) May 1992(d) April 1995 Subscribe to brighten your futureAn email was just sent to confirm your subscription. Please find the email and click 'Confirm Follow' to start subscribing. Email Address Subscribe Related