CO2 emissions data (visualization with scales and axes)

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Visualization using D3</title>
		<script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
		<style type="text/css">
			
			body {
				background-color: white;
				font-family: Helvetica, Arial, sans-serif;
			}

h1 {
				font-size: 22px;
				font-weight: bold;
				font-family: Helvetica;
				margin: 0;
				color: rgb(0, 0, 0);
			}

p {
				font-size: 14px;
				margin: 10px 0 0 0;
			}

svg {
				background-color: white;
			}

rect:hover {
				fill: red;
			}
			
			.axis path,
			.axis line {
				fill: none;
				stroke: gray;
				shape-rendering: crispEdges;
			}
			
			.axis text {
				font-family: sans-serif;
				font-size: 11px;
			}

.y.axis path,
			.y.axis line {
				opacity: 0;
			}

</style>
	</head>
	<body>

<h1>CO2 gas emissions by various countries for the year 1999</h1>

<p>Source: Air and Green House Gas emissions, <a href="https://data.oecd.org/air/air-and-ghg-emissions.htm">OECD</a>, 2012</p>

var strYear = '1999';

var w = 1200;
			var h = 1000;
			var padding = [10, 60, 60, 140];  // top, right, bottom, left

var widthScale = d3.scale.linear()
								.range([0, w - padding[1] - padding[3]]);
			
			var heightScale = d3.scale.ordinal()
								.rangeRoundBands([padding[0], h - padding[2]], 0.10); // separation of 10% between the bars

var xAxis = d3.svg.axis()
							.scale(widthScale)
							.orient("bottom");

var yAxis = d3.svg.axis()
							.scale(heightScale)
							.orient("left");

var svg = d3.select("body")
						.append("svg")
						.attr("width", w)
						.attr("height", h);

d3.csv("co2_emissions.csv", function(data) {

data.sort(function(a, b) {
					return d3.descending(+a[strYear], +b[strYear]);
				});

widthScale.domain([0, d3.max(data, function(d) {
					return +d[strYear];
				})]);

heightScale.domain(data.map(function(d) { 
					return d.Country;
				}));

var rects = svg.selectAll("rect")
								.data(data)
								.enter()
								.append("rect");

rects.attr("x", padding[3])
					.attr("y", function(d) {
						return heightScale(d.Country);
					})
					.attr("width", function(d) {
						return widthScale(d[strYear]);
					})
					.attr("height", heightScale.rangeBand())
					.attr("fill", "rgb(100, 100, 100)")
					.append("title")
					.text(function(d) {
						return "CO2 emission by " + d.Country + " in the year " + strYear + " was " + d[strYear] + " million tonnes.";
					});

svg.append("g")
					.attr("class", "x axis")
					.attr("transform", "translate(" + padding[3] + "," + (h - padding[2]) + ")")
					.call(xAxis);

svg.append("text")
					.attr("class", "x label")
					.attr("text-anchor", "middle")
					.attr("x", w / 2)
					.attr("y", h - padding[2] + 50)
					.text("million tonnes")

svg.append("g")
					.attr("class", "y axis")
					.attr("transform", "translate(" + padding[3] + ", 0)")
					.call(yAxis);

});

</script>
	</body>
</html>

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

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