Which country is the largest emitter of greenhouse gases? Mark as favorite Copy Link Answer the question in 30 seconds! United States India China Russia Check Answer
Which of the following is the most common water pollutant? Mark as favorite Copy Link Answer the question in 30 seconds! Nitrates Phosphates Bacteria Heavy metals Check Answer
Which of the following is the largest terrestrial biome on Earth? Mark as favorite Copy Link Answer the question in 30 seconds! Tropical rainforest Taiga Tundra Savanna Check Answer
Which renewable energy source is the most widely used globally? Mark as favorite Copy Link Answer the question in 30 seconds! Hydroelectric Wind Solar Geothermal Check Answer
Which of the following is the most common air pollutant? Mark as favorite Copy Link Answer the question in 30 seconds! Carbon monoxide Nitrogen oxides Sulfur dioxide Particulate matter Check Answer
Which of the following is the most diverse ecosystem on Earth? Mark as favorite Copy Link Answer the question in 30 seconds! Tropical rainforest Coral reef Savanna Temperate deciduous forest Check Answer
Which of the following is NOT a greenhouse gas? Mark as favorite Copy Link Answer the question in 30 seconds! Carbon dioxide Methane Nitrogen Water vapor Check Answer
Which of the following is the correct syntax for an if-else statement in PHP? Mark as favorite Copy Link Answer the question in 30 seconds! if(condition){ code }else{ code } if(condition) code; else code; if{condition} code; else code; if condition then code else code endif; Check Answer
Which of the following is the correct way to concatenate two strings in PHP? Mark as favorite Copy Link Answer the question in 30 seconds! $string1 . $string2 $string1 + $string2 $string1 : $string2 $string1 - $string2 Check Answer
Which keyword is used to define a function in PHP? Mark as favorite Copy Link Answer the question in 30 seconds! def function func define Check Answer