By Sergio Goncalves LISBON (Reuters) -Portugal’s three main glass producers and two biggest cement makers, together accounting for 10% of the country’s industrial carbon emissions, on Tuesday said they had joined a new consortium to launch a green hydrogen plant. The consortium, named Nazare Green Hydrogen Valley (NGHV), is led by Portugal-based renewable gas producer Rega Energy and includes cement companies Cimpor and Secil, plus glassmakers BA Glass, Crisal and Vidrala, NGHV said in a statement. The five produce more than 1 million tonnes of CO2 emissions a year, equivalent to 2.5% of Portu…