danielle merfeld is an electrical engineer who is chief technology officer and vice—president of ge renewablesggest creator of wind turbines worldwide, and she and her team currently have over 40,000 wind turbines out in the field. she'sjoining us by video link from north carolina, usa. kristian eikeland holmefjord is here from norway after braving ten days�* quarantine on arrival in the uk. kristian is at the forefront of efforts to develop battery—powered ships as project director of fuel cells at corvus energy. wind, solar batteries, ships — please welcome our panel. applause so, we're going to start with talking about where we are now, and i wanted to start with you, danielle. so, before we get going on the solutions, can we outline the challenge here? the international governmental panel on climate change has said that in order to avoid the worst ravages of the heating associated with climate change, we need renewable resources like solar and wind to provide 85% of global electricity by 2050. but where are we now, and what's the scale of the challenge that faces us? so, danielle, tell me