I'm interested in understanding climate change in Switzerland. Navigate to the 'Climate' section of MeteoSuisse.ch. Find the 'Climate Change in Switzerland' page and identify the average temperature increase in Switzerland since the start of measurements (around 1864) and the projected temperature increase by the end of the 21st century under a 'strong warming' scenario. Additionally, what is the current concentration of CO2 in the atmosphere as stated on this page?
Navigate to 'https://www.meteosuisse.admin.ch/home.html'. Locate and click on the 'Klima' (Climate) section or equivalent navigation link. Navigate to the 'Klimawandel in der Schweiz' (Climate Change in Switzerland) page. Identify the average temperature increase in Switzerland since approximately 1864. Identify the projected temperature increase by the end of the 21st century under a 'strong warming' scenario. Find and state the current concentration of CO2 in the atmosphere as mentioned on the page. Synthesize all three pieces of information into a concise answer.
The agent successfully navigates to the 'Klima' section. The agent successfully navigates to the 'Klimawandel in der Schweiz' page. The agent states that the average temperature in Switzerland has increased by around 2.0 °C since measurements began (around 1864). The agent states that under a 'strong warming' scenario, the temperature in Switzerland is projected to increase by 4.8 to 6.9 °C by the end of the 21st century. The agent states that the current concentration of CO2 in the atmosphere is around 420 ppm (parts per million).