WELLINGTON, New Zealand — New Zealand’s incoming government is hoping to make the nation greener by planting 100 million trees each year, ensuring the electricity grid runs entirely from renewable energy, and spending more money on cycle ways and rail transport. Jacinda Ardern, who takes over as prime minister this week, on Tuesday outlined agreements her Labour Party reached with other political parties joining them in the new government. …Ardern’s plan is for New Zealand to reduce its net greenhouse gas emissions to zero by the year 2050. …She said the country will need to double the amount of trees it plants each year, a goal she said was “absolutely achievable” by using land that was marginal for farming animals.