Sovereign investors tweak portfolios for environmental risk

* Norway, NZ, France SWFs leading the way on divestment

* Others looking to increase renewables exposure

* Paris climate agreement adds to pressure on investors

* TABLE-SWFs and climate change risk management:

By Claire Milhench

LONDON, June 19 (Reuters) - Some sovereign investors are reducing their exposure to fossil fuels or seeking clean alternatives to protect their portfolios from rising environmental risk.

Norway's $900 billion sovereign wealth fund (SWF) -- itself financed by oil sales -- and the New Zealand Super Fund (NZSF) are among those adjusting investments in anticipation of tougher environmental rules or damage from the impact of global warming.

Rising temperatures could lead to more violent storms and flooding, posing a threat to infrastructure and prime real estate, both favoured by sovereign investors.

U.N. scientists say greenhouse gases are the main cause of warming and while the U.S. administration has questioned the science, many countries are introducing rules to cut emissions.

Norway's SWF, the world's largest, is divesting from companies that derive more than 30 percent of their turnover or activity from coal, a major source of greenhouse gases. It is also investing in alternative fuel companies such as NextEra Energy, a U.S. wind farm developer.

By July the fund's ethics watchdog is likely to recommend the fund excludes or puts on a watch list the first of several firms in the oil, cement and steel industries. The fund is also pushing companies to disclose carbon emissions and plans to handle climate change risk.

"In terms of greenhouse gas emissions, we are actually expecting companies to increase reporting on it," the fund's chief executive Yngve Slyngstad told Reuters.

"We want to have more transparency on investment plans and how they are affected."

The NZSF said last year it would set a target by the end of June to reduce its carbon footprint.

"We should be able to increase our returns for the same risk, or get the same returns with less risk," Adrian Orr, chief executive of NZSF, said in November.

In an update, an NZSF spokeswoman said the fund was looking at its passive portfolio rules and this would lead to a reduction in fossil fuel holdings. More details would be given when the changes have been made, she said.

It has already invested in energy efficient glass manufacturer View and waste gas-to-fuel firm LanzaTech.

France's SWF Caisse des Depots (CDC) is also aiming to reduce the carbon footprint of its equity portfolio by 20 percent by 2020, and is exiting companies that derive more than 20 percent of revenue from coal.