I sent an e-mail to Environment Canada (EC) on Aug 2nd 2013 asking for a list of companies that are participating in geoengineering in Canada pursuant to the Weather Modifications Information Act. The WMI Act is a piece of legislation which lists the rules, restrictions and punishments for modifying the weather in Canada without government permission.
You can read Part 2 of the post here.
A partial paragraph from the reply:
Starting in 1948, the federal government was involved in weather modification experiments. Most of these activities took place in the 1960s and 1970s…. The research programs declined in the second half of the 1970s and ended in the early 1980s.
The article is informative and be sure to read the comments.