By Elliot Gulliver-Needham Prime Minister Rishi Sunak has defended the private sector investing in the weapons industry as “ethical”, as an argument rages over whether sustainable investing can align with the global war industry. In a joint statement with the Investment Association, the Treasury yesterday argued that investments with an environmental, social and governance (ESG) mandate can invest in the defence sector. “Investing in defence companies contributes to our national security, defends the civil liberties we all enjoy, while delivering long-term returns for pensions funds and retail…