Yes, climate protection should have been started 70 years ago. The scientific evidence of human-caused climate change has been clear for decades, and taking action earlier would have allowed for a smoother transition to renewable energy and a reduction in greenhouse gas emissions. Delaying action has led to more severe and costly impacts of climate change, making it even more urgent to take decisive action now. Starting climate protection 70 years ago would have helped to mitigate the worst effects of climate change and protect the planet for future generations. **

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Fifty years ago, online teaching would have been nearly impossible due to the lack of internet and digital technology. Instead, distance learning would have likely involved correspondence courses, where students would receive study materials and assignments by mail and submit their work through the postal service. Communication with instructors would have been limited to written letters or occasional phone calls. The lack of real-time interaction and multimedia resources would have made the online teaching experience much less dynamic and interactive compared to today's standards. **

To add Avast Online Security & Privacy as an add-on for Firefox, you can follow these steps: 1. Open your Firefox browser and go to the menu (three horizontal lines) in the top right corner. 2. Select "Add-ons" from the menu. 3. In the Add-ons Manager tab, search for "Avast Online Security & Privacy" in the search bar. 4. Once you find the add-on, click on "Add to Firefox" to install it. 5. After the installation is complete, you may need to restart your browser for the add-on to take effect. After following these steps, you should have successfully added Avast Online Security & Privacy as an add-on for Firefox. **

The message "Last online some time ago" on Viber means that the person you are trying to contact has not been active on the app for an unspecified amount of time. This message is displayed when the person has not been online for an extended period, and it indicates that they may not be readily available to respond to messages or calls. It is a way for Viber to inform users about the last time a contact was active on the platform. **

Four months ago, there was a significant increase in COVID-19 cases worldwide, leading to the implementation of stricter lockdown measures in many countries. Additionally, there were widespread protests against racial injustice following the killing of George Floyd in the United States. The global economy also experienced a downturn, with many businesses facing closures and layoffs. Overall, four months ago was a period marked by challenges and uncertainty on multiple fronts. **

25 years ago, several significant events occurred. In 1997, the Kyoto Protocol was adopted, aiming to reduce greenhouse gas emissions and combat climate change. The first Harry Potter book was also published, launching a global phenomenon. Additionally, the Mars Pathfinder successfully landed on Mars, marking a major milestone in space exploration. These events have had lasting impacts on the environment, literature, and our understanding of the universe. **

Fifty years ago, in 1971, several significant events took place around the world. In the United States, the voting age was lowered from 21 to 18 with the ratification of the 26th Amendment, allowing more young people to participate in the democratic process. In addition, the Apollo 14 mission successfully landed on the moon, furthering human exploration of space. In South Asia, the war between India and Pakistan resulted in the creation of Bangladesh as an independent nation. These events and others from 1971 continue to have a lasting impact on the world today. **