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VFR requires a pilot to be able to see outside the cockpit to control the aircraft's altitude, navigate, and avoid obstacles and other aircraft. [3] Governing agencies establish specific requirements for VFR flight, including minimum visibility, and distance from clouds, to ensure that aircraft operating under VFR are visible from enough distance to ensure safety.
Wind also limits tree growth. On coasts and isolated mountains, the tree line is often much lower than in corresponding altitudes inland and in larger, more complex mountain systems, because strong winds reduce tree growth.
[260] [261] Cave gates are sometimes installed to limit human entry into caves with sensitive or endangered bat species. The gates are designed not to limit the airflow, and thus to maintain the cave's micro-ecosystem. [262] Of the 47 species of bats found in the United States, 35 are known to use human structures, including buildings and bridges.
Joe Biden's tenure as the 46th president of the United States began with his inauguration on January 20, 2021. [1] [2] Biden, a member of the Democratic Party who previously served as vice president for two terms under President Barack Obama from 2009 to 2017, took office after his victory in the 2020 presidential election over the incumbent president, Donald Trump of the Republican Party.
Italy, [a] officially the Italian Republic, [b] is a country in Southern [12] and Western [13] [c] Europe.It consists of a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land border, as well as nearly 800 islands, notably Sicily and Sardinia. [15]
Precipitation is limited with dry season extending beyond the summer and average temperature depends on altitude and latitude. The oceanic climate ( Cfb ) is located in the northern quarter of the country, especially in the Atlantic region ( Basque Country , Cantabria , Asturias , and partly Galicia and Castile–León).