Around how many tons of hazardous waste does the world produce each year?

A United Nations conference has adopted measures to speed up global action to protect people and the environment from hazardous wastes. The measures were adopted at a conference in Geneva called to strengthen the Basel Convention, a U.N. treaty that laid down environmental standards for the disposal and management of hazardous wastes.
    The United Nations estimates the world produces around 150 million tons of hazardous waste each year. The major achievement of the conference, which concluded Friday, was the adoption of a strategic plan to deal with all this waste.