Can't install Cordova

Hi. I have a challenge installing cordova. The following are the error messages. I need help please. Thanks.
$ npm install -g cordova
npm WARN engine cordova-js@3.7.3: wanted: {“node”:"~0.10.x"} (current: {“node”:“
0.12.0”,“npm”:“2.5.1”})
npm WARN engine npm@1.4.28: wanted: {“node”:">=0.8",“npm”:“1”} (current: {“node”
:“0.12.0”,“npm”:“2.5.1”})
npm WARN engine xmlbuilder@2.2.1: wanted: {“node”:“0.8.x || 0.10.x”} (current: {
“node”:“0.12.0”,“npm”:“2.5.1”})
C:\Users\MTM\AppData\Roaming\npm\cordova -> C:\Users\MTM\AppData\Roaming\npm\nod
e_modules\cordova\bin\cordova
cordova@4.2.0 C:\Users\MTM\AppData\Roaming\npm\node_modules\cordova
├── underscore@1.7.0
├── q@1.0.1
├── nopt@3.0.1 (abbrev@1.0.5)
└── cordova-lib@4.2.0 (valid-identifier@0.0.1, osenv@0.1.0, properties-parser@0.
2.3, bplist-parser@0.0.6, mime@1.2.11, unorm@1.3.3, semver@2.0.11, shelljs@0.3.0
, dep-graph@1.1.0, rc@0.5.2, through2@0.6.3, npmconf@0.1.16, xcode@0.6.7, glob@4
.0.6, d8@0.4.4, elementtree@0.1.5, tar@1.0.2, request@2.47.0, plist@1.1.0, cordo
va-js@3.7.3, npm@1.4.28)

I don’t see any errors there, just warnings. Type cordova -v and if it prints out the version then it should be installed correctly.