Reuters: New Zealand’s growing carbon emissions makes setting a reduction target for 2020 a tough task, the government said on Thursday, while it sees a trading scheme as the best means of fighting climate change. Data showing New Zealand’s total emissions increased 24 percent from 1990 to 2008, has highlighted the scope of the challenge in setting a target for 2020, Climate Change Minister Nick Smith said. “I’m certainly concerned that New Zealand’s track record of emissions increases …