Please note that I am an AI language model and do not have real-time knowledge. However, as of my last update in October 2021, here
1. Solar power efficiency breakthroughs: Several breakthroughs were made in solar photovoltaic (PV) technology, including the development of perovskite solar cells with unprecedented efficiency levels.
1. COVID-19 Pandemic: The global outbreak of the novel coronavirus had massive political implications worldwide, impacting public health policies, economies, and social dynamics of countries.