The COP26 conference in Glasgow opened after the G20 economies did not commit to a 2050 target to stop net carbon emissions, a deadline seen as crucial to prevent severe global warming. The talks in Rome only acknowledged the importance of halting net emissions by mid-century, without setting a specific timeline for phasing out coal or making strong promises to reduce methane emissions. Greta Thunberg urged her supporters to sign an open letter accusing leaders of betrayal and called on them to address the climate emergency immediately. Many leaders will be speaking at the conference in Glasgow on Monday to discuss their climate change records and potentially make new pledges. British Prime Minister Boris Johnson will emphasize the urgency of the situation, stating that humanity must act now as time is running out on climate change. If we do not take action on climate change now, it will be too late for future generations to address the issue. Disagreement among major emitters on how to reduce coal, oil, and gas emissions and support developing countries in adapting to global warming will complicate the task. President Joe Biden criticized China and Russia for not presenting proposals at the G20 summit, where he is also facing opposition to his climate goals. Chinese President Xi Jinping, the largest emitter of greenhouse gases, will deliver a written statement at the conference on Monday. Turkish President Tayyip Erdogan will not be attending the COP26 conference in Glasgow due to Britain's failure to meet Ankara's security and protocol demands. The conference, delayed by a year because of the COVID-19 pandemic, aims to maintain the target of limiting global warming to 1.5 degrees Celsius above pre-industrial levels. To achieve this goal, more ambitious pledges to reduce emissions, climate-related financing for developing countries, and finalizing rules for the 2015 Paris Agreement are needed. Current emission reduction pledges would result in a 2.7 degree Celsius rise in temperature this century, leading to intensified storms, deadly heatwaves, floods, rising sea levels, and habitat destruction caused by climate change. Ugandan activist Evelyn Acham stated to the Italian newspaper La Stampa that Africa, despite being responsible for only 3 percent of global emissions, is facing the most severe consequences of the climate crisis. She emphasized that Africans are not to blame for the crisis, but are suffering due to the historical exploitation of Africa's resources during colonialism. Acham called for fair sharing of responsibilities in addressing the climate crisis. The two days of speeches by world leaders, beginning on Monday, will be followed by technical negotiations, with a deal possibly being reached close to or even after the event's November 12 conclusion.