Continuing its look at teleworking, Ottawa communications equipment maker Mitel Networks Corp. has released a study indicating that most Canadian and US workers believe working from home reduces greenhouse gas emissions through reduced travel. Nonetheless, 42% of Canadian and 54% of US employers worry about monitoring teleworkers' productivity. Regardless, companies expect teleworking to grow in the next five years. In a Mitel press release, Bob Fortier, president of the Canadian Telework Association, notes that employers might be more supportive of teleworking if the environmental benefits were better known. Mitel says that according to the US Energy Information Administration, carbon dioxide emissions from transportation have increased 1.5% annually since 1990. Earlier this year, Mitel reported that UK employers were also wary of teleworking.