First D3 bar chart of emissions data

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Greenhouse gas emissions in 2012</title>
		<script type="text/javascript" src="https://d3js.org/d3.v3.min.js"></script>
		
		<style type = "text/css">
			svg{background-color : #f0f0f0;}
		</style>
	</head>
	<body>

<h1> Greenhouse gas emissions in 2012 by country </h1>

// Add the SVG element
		var svg = d3.select("body")
			.append("svg")
			.attr("width", 600)
			.attr("height", 400);
		
		// Load the greenhouse gas data
		d3.csv("greenhouseGasData2012.csv", function(data) {
			
		// Sort the data
		data.sort(function(a,b) {return d3.descending(+a.totalEmissions, +b.totalEmissions);});
			
		// Create rectangles
		var rects = svg.selectAll("rect")
			.data(data)
			.enter()
			.append("rect");
			
		// Set rectangle attributes
		rects.attr("x", 0)
			.attr("y", function(d, i) {return i*12;})
			.attr("width", function(d) {return d.totalEmissions / 12000;})
			.attr("height", 10)
			.attr("fill", "blue")
			.append("title")
				.text(function(d) {return "Total emissions for " + d.Country + " in 2012 are " 
				+ Math.round(d.totalEmissions / 1000, 0) + " million tonnes CO2 equivalent.";});

});
		
		</script>

</body>
</html>

Modified http://d3js.org/d3.v3.min.js to a secure url

https://d3js.org/d3.v3.min.js